1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eb3c41adbe5e15870f9c19f3bd1eda1d883c2cebb125776aee47dc9cf1cf9e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcabf45f-f880-4a38-993d-3c74bc44219e.json and https://artists.proofprofile.net/proofs/artist/fcabf45f-f880-4a38-993d-3c74bc44219e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d158f432c69ab327722623f767adabe6b2c095c7fd6e9e9555ed3c267a4d7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76c9f4d21720102fe71332d0b52ae14bd8c5dd9a4c39b42ae2cbc69df12703d. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd207563a3a9995dafbf0e30751afa24b3d3e3de59e52ae321da461943db15fe7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf445e6329c9419212991ba097a5ad5296dbe2e9225c3a57cd628e6c47b24ec7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea4abc84dd975ae3e648e364a933661fc0f302a091d511b4e5812ed069651a2. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1d5210c1e7be9a1c4a96634185bf0ad035d0d283d66ede87a0278035a86c2d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade379cb967d15b9edaca76434df975d854aa28950e5b2d9a13f974169bd9fbd. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4b2383279c7f2c14b61e773dd627b7dd1b29d8223768fca1d9d807503775d7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRI100700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fcf8c4454b786c731e8cb27f684adf818dee70805b68cb2f2e603bcf6af0bd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN1800001.
Didn't My Lord Deliver Daniel - Acapella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9111b8a32ce7cac81541f885c36589bf8db28847771a9e1045a4516459134e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44f18306d674d6e646ac06648af807008e593d08b2f9cb5195bb6923686e247. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a90a0c3b418f396dc8694baa2c1d36439b36e863e720e9bfac7647bd654d7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c4db55b3c4b29156a8d90efa38230a2f45d5afe0bc6b0f4791d13133896044. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb93511b5e2379558a6830d13ef65fc782cb00ceb158aab8f447e94d1550b8be. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSIC2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec42863828292bb11dc9bb68d1ba49b2945037fac4aee8884f40d292aae3c4e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac8e1b99fb29e34ea93b683762da3a03d2af0e6816f7c43c44654b160fabb98. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5765f9463ad788fa09468b2e8a99d3e4ed46c95ce6d1d690aaaaa8fc1b53d82. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e66540a8ce6d377daffb7aabb258010706f0f1cba2c7e46be0d22670d9b10e3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3SN2500004.